ABSTRACT
This chapter describes the various topologies of voltage- and current-fed Dual active bridge (DAB) used for different applications in microgrid and fuel-cell energy generation system by using simulation process. Dual active bridge is an isolated bidirectional DC-DC converter (BDC) that comprises two full-bridge converters linked through a high-frequency transformer. The DAB DC-DC converters have the following advantages: weightlessness, high efficiency, compactness in size, and high reliability. A DAB is a BDC with identical primary and secondary side full bridges, a high-frequency transformer, an energy transfer inductor, and DC-link capacitors. A bidirectional DAB DC-DC converter is used most preferably, because it has the ability to make the current flow in both the directions. The chapter discusses the various topologies of isolated DC-DC DAB converters for microgrid applications. The DAB is a bidirectional, controllable, DC-DC converter that comprises eight semiconductor devices, a high-frequency transformer, an energy-transfer inductor, and DC-link capacitors.
